libs/ardour/session_butler.cc

   1 /*
   2     Copyright (C) 1999-2002 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <algorithm>
  21 #include <string>
  22 #include <cmath>
  23 #include <cerrno>
  24 #include <unistd.h>
  25 #include <fcntl.h>
  26 #include <poll.h>
  27
  28 #include <glibmm/thread.h>
  29
  30 #include "pbd/error.h"
  31 #include "pbd/pthread_utils.h"
  32 #include "pbd/stacktrace.h"
  33
  34 #include "ardour/audio_diskstream.h"
  35 #include "ardour/audioengine.h"
  36 #include "ardour/butler.h"
  37 #include "ardour/configuration.h"
  38 #include "ardour/crossfade.h"
  39 #include "ardour/io.h"
  40 #include "ardour/midi_diskstream.h"
  41 #include "ardour/session.h"
  42 #include "ardour/timestamps.h"
  43 #include "ardour/track.h"
  44
  45 #include "i18n.h"
  46
  47 using namespace std;
  48 using namespace ARDOUR;
  49 using namespace PBD;
  50
  51 /* XXX put this in the right place */
  52
  53 static inline uint32_t next_power_of_two (uint32_t n)
  54 {
  55         --n;
  56         n |= n >> 16;
  57         n |= n >> 8;
  58         n |= n >> 4;
  59         n |= n >> 2;
  60         n |= n >> 1;
  61         ++n;
  62         return n;
  63 }
  64
  65 /*---------------------------------------------------------------------------
  66  BUTLER THREAD
  67  ---------------------------------------------------------------------------*/
  68
  69 void
  70 Session::adjust_playback_buffering ()
  71 {
  72         request_stop (false, false);
  73         SessionEvent *ev = new SessionEvent (SessionEvent::AdjustPlaybackBuffering, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
  74         queue_event (ev);
  75 }
  76
  77 void
  78 Session::adjust_capture_buffering ()
  79 {
  80         request_stop (false, false);
  81         SessionEvent *ev = new SessionEvent (SessionEvent::AdjustCaptureBuffering, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
  82         queue_event (ev);
  83 }
  84
  85 void
  86 Session::schedule_playback_buffering_adjustment ()
  87 {
  88         add_post_transport_work (PostTransportAdjustPlaybackBuffering);
  89         _butler->schedule_transport_work ();
  90 }
  91
  92 void
  93 Session::schedule_capture_buffering_adjustment ()
  94 {
  95         add_post_transport_work (PostTransportAdjustCaptureBuffering);
  96         _butler->schedule_transport_work ();
  97 }
  98
  99 void
 100 Session::schedule_curve_reallocation ()
 101 {
 102         add_post_transport_work (PostTransportCurveRealloc);
 103         _butler->schedule_transport_work ();
 104 }
 105
 106 void
 107 Session::request_overwrite_buffer (Track* t)
 108 {
 109         SessionEvent *ev = new SessionEvent (SessionEvent::Overwrite, SessionEvent::Add, SessionEvent::Immediate, 0, 0, 0.0);
 110         ev->set_ptr (t);
 111         queue_event (ev);
 112 }
 113
 114 /** Process thread. */
 115 void
 116 Session::overwrite_some_buffers (Track* t)
 117 {
 118         if (actively_recording()) {
 119                 return;
 120         }
 121
 122         if (t) {
 123
 124                 t->set_pending_overwrite (true);
 125
 126         } else {
 127
 128                 boost::shared_ptr<RouteList> rl = routes.reader();
 129                 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
 130                         boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
 131                         if (tr) {
 132                                 tr->set_pending_overwrite (true);
 133                         }
 134                 }
 135         }
 136
 137         add_post_transport_work (PostTransportOverWrite);
 138         _butler->schedule_transport_work ();
 139 }
 140
 141 uint32_t
 142 Session::playback_load ()
 143 {
 144         return (uint32_t) g_atomic_int_get (&_playback_load);
 145 }
 146
 147 uint32_t
 148 Session::capture_load ()
 149 {
 150         return (uint32_t) g_atomic_int_get (&_capture_load);
 151 }